tbh, I play all of these games just for adult-scenes.
It's really rare case when the story hits me and I read all the text. Mostly, I just skippin to what I'm lookin for, doin some things with my wiggly-diggly and that's it.
So, I prefer either best (I repeat, not good but best) quality models/graphic (f.e. Zeno's Anthology by Chemical Fire), or individual art style (f.e. The Secret of the House by Discreen Vision | every game by NTL Media | Dr.Bones games (sad that he stopped dev)).
Also, I'm in MILF tag for sure and I'm so long in this game and have seen so many projects, that by now I literally hate all of this similar-lookin RenPy games with these "iconic" models of women. I'm in love with games, where especially MILFs look average. With normal breasts, not-cadillac-sized asses, maybe with little belly and juicy hips (not that type of women that spent whole day in a gym), maybe with faces that someone could name as ugly. You know, that MILFs that you could meet outside, not only on internet or porn. That's a gem for me. (f.e. Area69 by k78Games | Taffy Tales by UberPie | Behind the Closed Door by LBW)
As I started playin VNs few years ago, I played mostly every game that I saw, but now it's really hard for me to choose the one for the evening session.
I recently realized that I really like Japanese RPGMs games (tried two games by ODENsensei and they're awesome). They're really pervs.
And you know, in Russian there is proverb that literally says "Everyone's jerking like they wanting" so it's just my opinion and I'm not trying to blame people with other ones.
peace